Google Research unveils Diffusion Controller for steering AI image generation

Google Research introduced Diffusion Controller, a framework that treats image generation as a continuous control problem rather than separate inference-time guidance and fine-tuning fixes.

Its lightweight add-on "steering damper" network keeps the base model frozen and works on black-box or gray-box models, and it outperformed the industry standard on human preference matching.

In a Stable Diffusion v1.4 test, the fully unlocked version achieved a 90% win rate over the baseline.